Sensitivity was 20 μV/division, sweep speed was 1 ms/division. Low frequency filter, high-frequency filter, duration of pulse, rate of pulse, and the machine used were not specified.
This study was performed in the supine position, with the subject lying on a couch and covered with blankets.
Following the orthodromic method, signals were recorded at the wrist and just above the elbow and on the course of the median nerve . For recording at the wrist (R), the active (A) electrode was placed proximally to the distal crease at the wrist; the reference (R) electrode was placed 3 cm proximally to the active electrode (Fig. 1). For recording at the elbow (R), the active (A) electrode was placed proximally to the wrist; the reference (R) electrode was placed proximally to the active electrode (Fig. 2). Distances between recording and stimulating electrodes were not fixed; the authors mapped out the course of the median nerve, before applying the...
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